i have mounted my acewell 3000 speedo on sterring wheel but i am not sure how to get the wires to it?
any ideas?
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Pretty sure that wont be liked by the SVA inspector. The only way you could get the wires to it would be through a brushed ring, same as your horn connection, I would say it's really a no go-er!
Would also be a big help to make your pictures a wee bit smaller.

If you must have it there you could probably use a curly cable like the ones used on F1 cars etc.

However, besides a probable SVA failure, I reckon it will be horrible to drive being unable to hold the steering wheel properly at the section with the speedo in it.

Id strongly recommend against it for SVA. It will cause all sorts of hassles. The manual may not say you have to be able to comfortably hold every section of the steering wheel but if the tester thinks it could cause an obstruction in an emergency it will fail with no discussion. Try and put it behind wheel for SVA so it is in exempt area - of course making sure you can see it easily.

After SVA you may fancy a removable boss. Im sure ive seen race bosses that have the electrical connections built in for wheel mounted electronics. Cant remember where off hand. Try searching SPA design etc.